package org.strongme.util;

import java.io.UnsupportedEncodingException;

public class ChineseChar2EnUtils {
	  private final static int[] li_SecPosValue = { 1601, 1637, 1833, 2078, 2274,  
	            2302, 2433, 2594, 2787, 3106, 3212, 3472, 3635, 3722, 3730, 3858,  
	            4027, 4086, 4390, 4558, 4684, 4925, 5249, 5590 };  
	    private final static String[] lc_FirstLetter = { "a", "b", "c", "d", "e",  
	            "f", "g", "h", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s",  
	            "t", "w", "x", "y", "z" };  
	  
	    /** 
	     * 取得给定汉字串的首字母串,即声母串 
	     * @param str 给定汉字串 
	     * @return 声母串 
	     */  
	    public static String getAllFirstLetter(String str) {  
	        if (str == null || str.trim().length() == 0) {  
	            return "";  
	        }  
	  
	        String _str = "";  
	        for (int i = 0; i < str.length(); i++) {  
	            _str = _str + getFirstLetter(str.substring(i, i + 1));  
	        }  
	  
	        return _str;  
	    }  
	  
	    /** 
	     * 取得给定汉字的首字母,即声母 
	     * @param chinese 给定的汉字 
	     * @return 给定汉字的声母 
	     */  
	    public static String getFirstLetter(String chinese) {  
	        if (chinese == null || chinese.trim().length() == 0) {  
	            return "";  
	        }  
	        chinese = conversionStr(chinese, "GB2312", "ISO8859-1");  
	  
	        if (chinese.length() > 1) // 判断是不是汉字  
	        {  
	            int li_SectorCode = (int) chinese.charAt(0); // 汉字区码  
	            int li_PositionCode = (int) chinese.charAt(1); // 汉字位码  
	            li_SectorCode = li_SectorCode - 160;  
	            li_PositionCode = li_PositionCode - 160;  
	            int li_SecPosCode = li_SectorCode * 100 + li_PositionCode; // 汉字区位码  
	            if (li_SecPosCode > 1600 && li_SecPosCode < 5590) {  
	                for (int i = 0; i < 23; i++) {  
	                    if (li_SecPosCode >= li_SecPosValue[i]  
	                            && li_SecPosCode < li_SecPosValue[i + 1]) {  
	                        chinese = lc_FirstLetter[i];  
	                        break;  
	                    }  
	                }  
	            } else // 非汉字字符,如图形符号或ASCII码  
	            {  
	                chinese = conversionStr(chinese, "ISO8859-1", "GB2312");  
	                chinese = chinese.substring(0, 1);  
	            }  
	        }  
	  
	        return chinese;  
	    }  
	  
	    /** 
	     * 字符串编码转换 
	     * @param str 要转换编码的字符串 
	     * @param charsetName 原来的编码 
	     * @param toCharsetName 转换后的编码 
	     * @return 经过编码转换后的字符串 
	     */  
	    private static String conversionStr(String str, String charsetName,String toCharsetName) {  
	        try {  
	            str = new String(str.getBytes(charsetName), toCharsetName);  
	        } catch (UnsupportedEncodingException ex) {  
	            System.out.println("字符串编码转换异常：" + ex.getMessage());  
	        }  
	        return str;  
	    }  
	  
}

